<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title>Google Maps JavaScript API Example: Editable Polylines</title>
<script src="http://maps.google.com/maps?file=api&amp;v=2.x&amp;key=ABQIAAAA-O3c-Om9OcvXMOJXreXHAxQGj0PqsCtxKvarsoS-iqLdqZSKfxS27kJqGZajBjvuzOBLizi931BUow"
type="text/javascript"></script>
<style type="text/css">
body {
font-family: Arial, sans serif;
font-size: 11px;
}
#hand_b {
width:31px;
height:31px;
background-image: url(http://google.com/mapfiles/ms/t/Bsu.png);
}
#hand_b.selected {
background-image: url(http://google.com/mapfiles/ms/t/Bsd.png);
}

#placemark_b {
width:31px;
height:31px;
background-image: url(http://google.com/mapfiles/ms/t/Bmu.png);
}
#placemark_b.selected {
background-image: url(http://google.com/mapfiles/ms/t/Bmd.png);
}

#line_b {
width:31px;
height:31px;
background-image: url(http://google.com/mapfiles/ms/t/Blu.png);
}
#line_b.selected {
background-image: url(http://google.com/mapfiles/ms/t/Bld.png);
}

#shape_b {
width:31px;
height:31px;
background-image: url(http://google.com/mapfiles/ms/t/Bpu.png);
}
#shape_b.selected {
background-image: url(http://google.com/mapfiles/ms/t/Bpd.png);
}
</style>
<script type="text/javascript">
var COLORS = [["red", "#ff0000"], ["orange", "#ff8800"], ["green","#008000"],
["blue", "#000080"], ["purple", "#800080"]];
var options = {};
var lineCounter_ = 0;
var shapeCounter_ = 0;
var markerCounter_ = 0;
var colorIndex_ = 0;
var featureTable_;
var map;

function select(buttonId) {
document.getElementById("hand_b").className="unselected";
document.getElementById("shape_b").className="unselected";
document.getElementById("line_b").className="unselected";
document.getElementById("placemark_b").className="unselected";
document.getElementById(buttonId).className="selected";
}

function stopEditing() {
select("hand_b");
}

function getColor(named) {
return COLORS[(colorIndex_++) % COLORS.length][named ? 0 : 1];
}

function getIcon(color) {
var icon = new GIcon();
icon.image = "http://google.com/mapfiles/ms/micons/" + color + ".png";
icon.iconSize = new GSize(32, 32);
icon.iconAnchor = new GPoint(15, 32);
return icon;
}

function startShape() {
select("shape_b");
var color = getColor(false);
var polygon = new GPolygon([], color, 2, 0.7, color, 0.2);
startDrawing(polygon, "Shape " + (++shapeCounter_), function() {
var cell = this;
var area = polygon.getArea();
cell.innerHTML = (Math.round(area / 10000) / 100) + "km<sup>2</sup>";
}, color);
}

function startLine() {
select("line_b");
var color = getColor(false);
var line = new GPolyline([], color);
startDrawing(line, "Line " + (++lineCounter_), function() {
var cell = this;
var len = line.getLength();
cell.innerHTML = (Math.round(len / 10) / 100) + "km";
}, color);
}

function addFeatureEntry(name, color) {
currentRow_ = document.createElement("tr");
var colorCell = document.createElement("td");
currentRow_.appendChild(colorCell);
colorCell.style.backgroundColor = color;
colorCell.style.width = "1em";
var nameCell = document.createElement("td");
currentRow_.appendChild(nameCell);
nameCell.innerHTML = name;
var descriptionCell = document.createElement("td");
currentRow_.appendChild(descriptionCell);
featureTable_.appendChild(currentRow_);
return {desc: descriptionCell, color: colorCell};
}

function startDrawing(poly, name, onUpdate, color) {
map.addOverlay(poly);
poly.enableDrawing(options);
poly.enableEditing({onEvent: "mouseover"});
poly.disableEditing({onEvent: "mouseout"});
GEvent.addListener(poly, "endline", function() {
select("hand_b");
var cells = addFeatureEntry(name, color);
GEvent.bind(poly, "lineupdated", cells.desc, onUpdate);
GEvent.addListener(poly, "click", function(latlng, index) {
if (typeof index == "number") {
poly.deleteVertex(index);
} else {
var newColor = getColor(false);
cells.color.style.backgroundColor = newColor
poly.setStrokeStyle({color: newColor, weight: 4});
}
});
});
}

function placeMarker() {
select("placemark_b");
var listener = GEvent.addListener(map, "click", function(overlay, latlng) {
if (latlng) {
select("hand_b");
GEvent.removeListener(listener);
var color = getColor(true);
var marker = new GMarker(latlng, {icon: getIcon(color), draggable: true});
map.addOverlay(marker);
var cells = addFeatureEntry("Placemark " + (++markerCounter_), color);
updateMarker(marker, cells);
GEvent.addListener(marker, "dragend", function() {
updateMarker(marker, cells);
});
GEvent.addListener(marker, "click", function() {
updateMarker(marker, cells, true);
});
}
});
}

function updateMarker(marker, cells, opt_changeColor) {
if (opt_changeColor) {
var color = getColor(true);
marker.setImage(getIcon(color).image);
cells.color.style.backgroundColor = color;
}
var latlng = marker.getPoint();
cells.desc.innerHTML = "(" + Math.round(latlng.y * 100) / 100 + ", " +
Math.round(latlng.x * 100) / 100 + ")";
}


function initialize() {
if (GBrowserIsCompatible()) {
map = new GMap2(document.getElementById("map"));
map.setCenter(new GLatLng(37.4419, -122.1419), 13);
map.addControl(new GSmallMapControl());
map.addControl(new GMapTypeControl());
map.clearOverlays();
featureTable_ = document.getElementById("featuretbody");
select("hand_b");
}
}
</script>
</head>
<body onload="initialize()" onunload="GUnload">

<table><tr style="vertical-align:top">
<td style="width:15em">

<table><tr>
<td><div id="hand_b"
onclick="stopEditing()"/></td>
<td><div id="placemark_b"
onclick="placeMarker()"/></td>
<td><div id="line_b"
onclick="startLine()"/></td>
<td><div id="shape_b"
onclick="startShape()"/></td>
</tr></table>


    <input type="hidden" id="featuredetails" rows=2>
    </input>
<p>To draw on the map, click on one of the buttons and then click on the map.  Double-click to stop drawing a line or shape. Click on an element to change color. To edit a line or shape, mouse over it and drag the points.  Click on a point to delete it.
</p>
     <table id ="featuretable">
     <tbody id="featuretbody"></tbody>
    </table>
  </td>
  <td>
    <!-- The frame used to measure the screen size -->
    <div id="frame"></div>
    <div id="map" style="width: 300px; height: 300px"></div>
  </td>
</tr></table>
</body>
</html>
